// 不换行
no-wrap()
  text-overflow: ellipsis
  overflow: hidden
  white-space: nowrap

// 扩展点击区域
extend-click()
  position: relative
  &:before
    content: ''
    position: absolute
    top: -10px
    left: -10px
    right: -10px
    bottom: -10px

// placeholder color 

placeholder-color() 
  ::-webkit-input-placeholder
    color #cccdd0
  ::-moz-placeholder 
    color #cccdd0
  :-ms-input-placeholder  
    color #cccdd0